Improvement in chain-pumps



A. J. PURVIANCE.

' CHAIN-PUMP." No.181,475 Patentd Aug.22,1876.

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UNITED STATES PATENT OrrroE ALFRED J. PURVIANGE, OF KEOKUK, IOWA.

IMPROVEMENT IN CHAIN-PUMPS.

Specification forming part of Letters Patent No. 18 L475, dated August22, 1876; application filed J une 13, 1876.

To all whom it may concern:

Be it known that I, A. J. PURVIANGE, of Keokuk, in the county of Lee andState of Iowa, have invented certain new and useful Improvements inChain-Pumps; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as, will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form part of thisspecification.

My invention relates to an improvement in chain-pumps; and it consistsin the arrangement and combination of parts that will be more fullydescribed hereinafter, whereby each bucket is provided with a compoundswivelvalve, and with a valve to close the drainage. It also consists ina slitted sheet of some material that is secured to the top of the stockto prevent water from being carried upon the chain.

The accompanying drawings represent in invention.

a represents the metallic frame, around which the rubber c is placed.This frame has a wide flange around its lower edge to support therubber, while .its upper end flares outward, as shown. In the top ofthis frame is made a tapering recess, 61. In the lower side of thisframe is made a smaller recess, 0, into which fits the valve 9 on theupper side of the plate h, for the purpose of closing the lower endofthe opening i, through the frame to stop the leakage of water as thebucket is being drawn upward. The link 0 of the chain that supports eachbucket has a loop formed in its upper 'end, while its lower end consistsof a straight rod that passes down through the opening z', leavingsufficient room for the free drainage of water when the opening is notclosed by the valve g. Upon the lower end of the link 0 is pivoted theplate h, which revolves freely around, and which has a recess, it,formed in its lower side, to receive the valve 1 formed by the head onthe lower end of the link 0. This valve 1 is made cone-shaped, as shown,so as to preventleakage at this point, as long as the chain is taut; butas soon as the chain is slackened in the least, the water above thebucket at once begins to leak through this valve. Not only does thisvalve serve for leakage, but as a pivot upon which the valve h turns.Projecting from the under side of this plate is a link, 2, to which theother part 'of'the chain is to be attached.

By means-of this double swivel-valve, the

chain is made much more flexible, and is not so liable to bind uponitself, catch in the tube, or break, and by means of the openingthroughthe center of the bucket and the valves a free full draining of the tubeis obtained as soon as the chain is slackened, so that the water cannotfreeze in the tube.

Upon the top of the stock 5 is placed a sheet, 6, of rubber, leather, orother material, which is slit and cut, as shown. The chain and bucketspass freely up through this sheet, but the sheet prevents the upwardpassage of water to the lifting-wheel, so as to prevent freezing in coldweather, and the wetting of the curb. v l

On the lower end of the stock is placed a metal casting, 7, which servesto protect the stock, and at the same time dispenses with the usualguide-wheel.

Having thus described my invention, I claim- 1. A bucket forchain-pumps, having a double swivel-valve, as described.

2. A bucket for chain-pumps, having an opening through its center, andtwo or more nation of a double swivel-valve and an opening, r, fordrainage through the center, substantially as set forth.

5. The slitted sheet 6, placed upon the top of the stock, as shown. 9

In testimony that I claim the foregoing I have hereunto set my'hand this24th day of February, 1876.

ALFRED JAMES PURVIANOE.

Witnesses SAML. M. .MILLS, J W. KITTLE.

